The Explore Scientific Field Flattener f/5 to f/7 Refractorsgoes between your telescope and camera to correct coma aberration for sharp images of stars in the corners of your photos. It is designed to work with telescopes with focal ratios between f/5 and 7 and requires 55mm (±2mm) of spacing between the back of the device and the camera sensor.

This device is for photographic use only. It is not intended for visual use.

Corrects Coma Aberration for Photography

• For refractor-type telescopes with a focal ratio of f/5 to 7

• Causes no change to the telescope focal length

• 2" barrel to easily attach to a 2" focuser

• Fully multicoated optics

• T-ring thread on the device so a T-ring can be used to easily attach a DSLR camera or a dedicated astrocamera

• 38mm of clear aperture

• Requires 55mm (±2mm) of back focus/spacing between the device and the camera sensor

• Premium high glossy anodizing finish

• DAR1020765-01

• DAR127065-02

• DAR152065-01

• ES-ED0806-02

• ES-ED10207-02

• FCD100-0806-01

• FCD100-10207-02

Related Questions and Answers

Q: 1. Does the mirror come with a center dot?

A: Yes it does.

Q: 2. Will this [safely] fit a 130mm (5.1") reflector tube?

A: This Cradle Assembly from Explore Scientific is a replacement for the cradle assembly included with the white 127mm telescope OTA but can also be used with other telescopes that would snugly fit its 5" inside diameter.

Q: 3. I have an older Televue Pronto 70.4mm f6.8 ED Doublet with a 2 inch focuser. Can I use this focal reducer with this telescope?

A: Yes you should be able to without any issues.

Q: 4. Will this work with my Lunt 152mm ED APO f/8 which has a 3 inch Feather Touch focuser?

A: Yes, the ES 0.7x Reducer should work reasonably well with a 3 inch focuser. There are three options for attaching the reducer to a focuser, a 3 inch adapter and two smaller adapters. The upper left cylinder in the product photo is for a 3 inch focuser. It has a 76mm outside diameter and 74mm ID with female threads. The 3 inch adapter screws on to the bottom (scope side) of the reducer. It appears to be designed to either be inserted into the focuser tube or screwed on, depending on your setup. I use it with a 127mm f/7.5 APO and it covers a full frame (35mm) sensor with sharp stars, but with some vignetting in the corners. Two issues I have with the reducer are 1) the T adpater is standard 42mm, as opposed to 48mm, and so produces more vignetting than is necessary given its 3 inch optics. 2) Given the 55mm T adapter shoulder to sensor plane recommendation, there are no 48mm threads or room for a screw in filter. I just ordered and adapter that will allow for screw in filters on the focuser end of the reducer.Hope this helps.

Q: 5. I have a 114 mm telescope I know this would probably be too big do you have a recommendation anything close would be good.

A: 114mm = 4.48819 inches. The closest size rings B&H would carry would be the Tele Vue Mount Ring Set for 4" OTAs BH #TEMTS4Q • MFR #MRS-4011 or the Vixen Optics Tube Rings with 115mm Inner Diameter (Pair) BH #VITRW115 • MFR #ES2665

Q: 6. Will this fit the Sky Watcher 127mm MakCas and how long will it take to get it in?

A: The telescopes listed as compatible for the Explore Scientific Cradle Assembly for White 127mm Telescope are": The Explore Scientific AR127 Explore Scientific ED127 Explore Scientific FCD100 ED127 Explore Scientific FirstLight And the computer says, the Cradle Ring will be in 7 to 14 days from the day it is ordered.

Q: 7. I see the telescope comes with a 1.25" reducer adapter to accommodate 1.25" eyepieces. What is the diameter of the focuser?

A: The reducer that is part of the diagonal in this FirstLight 114mm F/4.3 Reflector Telescope is 1.25" diameter .

Q: 8. can I use this on a Explore Scientific ED102 FCD 100 with a ZWO ASI 1600 MM camera?

A: Yes it should work

Q: 9. I have Explore Scientific ED80 80mm f/6 Carbon Fiber APO Refractor Telescope, iOptron SkyGuider Pro EQ Camera Mount, iOptron 1.25" Stainless Steel Tripod, and my camera is Sony A6000, what should I need to make it work?

A: If you want to mount your Sony A6000 body on your scope you will need a Celetron camera mount (B&H# CETA1.25). This will go into the scope in place of the eyepiece. A T-ring which will mount onto the camera body in place of the lens (B&H# VELANEXT). These two pieces will now screw together.

Q: 10. The image from the telescope is upside down and backwards. How do I fix this?

A: You would just need to add a 90 Degree Star Diagonal. The Celestron 90° Star Diagonal (1.25") will work. Link: https://bhpho.to/3t4ZEMK